body{
    background-color: rgba(0,0,0,0.1);
}
/* 悬停动画 */
.card { transition: transform 0.3s ease, box-shadow 0.3s ease; }
.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0.5rem 1rem rgba(0,0,0,0.15);
}

/* 导航链接动画 */
.nav-link { transition: all 0.2s ease; }
.nav-link:hover {
    transform: translateY(-2px);
    color: var(--bs-primary) !important;
}

/* 按钮悬停效果 */
.btn-outline-secondary:hover { background: var(--bs-primary); }